X-Git-Url: http://git.ipfire.org/?a=blobdiff_plain;f=backend%2Frunloop.c;h=bbf565d5fee73cdc742cd1eabbb9052da3d207ad;hb=a4f1b3dff2cc9e7c0adb6b221bf3544955a45a71;hp=461bbb4e7248f1efc570aef77ae49695716a3b60;hpb=f7deaa1a21758ec90bf23314af018481ea8aea7f;p=thirdparty%2Fcups.git diff --git a/backend/runloop.c b/backend/runloop.c index 461bbb4e7..bbf565d5f 100644 --- a/backend/runloop.c +++ b/backend/runloop.c @@ -1,31 +1,23 @@ /* - * "$Id: runloop.c 6170 2007-01-02 17:26:41Z mike $" + * "$Id: runloop.c 6834 2007-08-22 18:29:25Z mike $" * - * Common run loop API for the Common UNIX Printing System (CUPS). + * Common run loop APIs for the Common UNIX Printing System (CUPS). * + * Copyright 2007-2008 by Apple Inc. * Copyright 2006-2007 by Easy Software Products, all rights reserved. * * These coded instructions, statements, and computer programs are the - * property of Easy Software Products and are protected by Federal - * copyright law. Distribution and use rights are outlined in the file + * property of Apple Inc. and are protected by Federal copyright + * law. Distribution and use rights are outlined in the file "LICENSE.txt" * "LICENSE" which should have been included with this file. If this - * file is missing or damaged please contact Easy Software Products - * at: - * - * Attn: CUPS Licensing Information - * Easy Software Products - * 44141 Airport View Drive, Suite 204 - * Hollywood, Maryland 20636 USA - * - * Voice: (301) 373-9600 - * EMail: cups-info@cups.org - * WWW: http://www.cups.org + * file is missing or damaged, see the license at "http://www.cups.org/". * * This file is subject to the Apple OS-Developed Software exception. * * Contents: * - * backendRunLoop() - Read and write print and back-channel data. + * backendDrainOutput() - Drain pending print data to the device. + * backendRunLoop() - Read and write print and back-channel data. */ /* @@ -33,6 +25,7 @@ */ #include "backend-private.h" +#include #ifdef __hpux # include #else @@ -40,16 +33,187 @@ #endif /* __hpux */ +/* + * 'backendDrainOutput()' - Drain pending print data to the device. + */ + +int /* O - 0 on success, -1 on error */ +backendDrainOutput(int print_fd, /* I - Print file descriptor */ + int device_fd) /* I - Device file descriptor */ +{ + int nfds; /* Maximum file descriptor value + 1 */ + fd_set input; /* Input set for reading */ + ssize_t print_bytes, /* Print bytes read */ + bytes; /* Bytes written */ + char print_buffer[8192], /* Print data buffer */ + *print_ptr; /* Pointer into print data buffer */ + struct timeval timeout; /* Timeout for read... */ + + + fprintf(stderr, "DEBUG: backendDrainOutput(print_fd=%d, device_fd=%d)\n", + print_fd, device_fd); + + /* + * Figure out the maximum file descriptor value to use with select()... + */ + + nfds = (print_fd > device_fd ? print_fd : device_fd) + 1; + + /* + * Now loop until we are out of data from print_fd... + */ + + for (;;) + { + /* + * Use select() to determine whether we have data to copy around... + */ + + FD_ZERO(&input); + FD_SET(print_fd, &input); + + timeout.tv_sec = 0; + timeout.tv_usec = 0; + + if (select(nfds, &input, NULL, NULL, &timeout) < 0) + return (-1); + + if (!FD_ISSET(print_fd, &input)) + return (0); + + if ((print_bytes = read(print_fd, print_buffer, + sizeof(print_buffer))) < 0) + { + /* + * Read error - bail if we don't see EAGAIN or EINTR... + */ + + if (errno != EAGAIN || errno != EINTR) + { + perror("ERROR: Unable to read print data"); + return (-1); + } + + print_bytes = 0; + } + else if (print_bytes == 0) + { + /* + * End of file, return... + */ + + return (0); + } + + fprintf(stderr, "DEBUG: Read %d bytes of print data...\n", + (int)print_bytes); + + for (print_ptr = print_buffer; print_bytes > 0;) + { + if ((bytes = write(device_fd, print_ptr, print_bytes)) < 0) + { + /* + * Write error - bail if we don't see an error we can retry... + */ + + if (errno != ENOSPC && errno != ENXIO && errno != EAGAIN && + errno != EINTR && errno != ENOTTY) + { + _cupsLangPrintf(stderr, _("ERROR: Unable to write print data: %s\n"), + strerror(errno)); + return (-1); + } + } + else + { + fprintf(stderr, "DEBUG: Wrote %d bytes of print data...\n", (int)bytes); + + print_bytes -= bytes; + print_ptr += bytes; + } + } + } +} + + +/* + * 'backendNetworkSideCB()' - Handle common network side-channel commands. + */ + +void +backendNetworkSideCB( + int print_fd, /* I - Print file or -1 */ + int device_fd, /* I - Device file or -1 */ + int snmp_fd, /* I - SNMP socket */ + http_addr_t *addr, /* I - Address of device */ + int use_bc) /* I - Use back-channel data? */ +{ + cups_sc_command_t command; /* Request command */ + cups_sc_status_t status; /* Request/response status */ + char data[2048]; /* Request/response data */ + int datalen; /* Request/response data size */ + const char *device_id; /* 1284DEVICEID env var */ + + + datalen = sizeof(data); + + if (cupsSideChannelRead(&command, &status, data, &datalen, 1.0)) + { + _cupsLangPuts(stderr, _("WARNING: Failed to read side-channel request!\n")); + return; + } + + switch (command) + { + case CUPS_SC_CMD_DRAIN_OUTPUT : + /* + * Our sockets disable the Nagle algorithm and data is sent immediately. + */ + + if (backendDrainOutput(print_fd, device_fd)) + status = CUPS_SC_STATUS_IO_ERROR; + else + status = CUPS_SC_STATUS_OK; + + datalen = 0; + break; + + case CUPS_SC_CMD_GET_BIDI : + data[0] = use_bc; + datalen = 1; + break; + + case CUPS_SC_CMD_GET_DEVICE_ID : + if ((device_id = getenv("1284DEVICEID")) != NULL) + { + strlcpy(data, device_id, sizeof(data)); + datalen = (int)strlen(data); + break; + } + + default : + status = CUPS_SC_STATUS_NOT_IMPLEMENTED; + datalen = 0; + break; + } + + cupsSideChannelWrite(command, status, data, datalen, 1.0); +} + + /* * 'backendRunLoop()' - Read and write print and back-channel data. */ ssize_t /* O - Total bytes on success, -1 on error */ backendRunLoop( - int print_fd, /* I - Print file descriptor */ - int device_fd, /* I - Device file descriptor */ - int use_bc, /* I - Use back-channel? */ - void (*side_cb)(int, int, int)) /* I - Side-channel callback */ + int print_fd, /* I - Print file descriptor */ + int device_fd, /* I - Device file descriptor */ + int snmp_fd, /* I - SNMP socket or -1 if none */ + http_addr_t *addr, /* I - Address of device */ + int use_bc, /* I - Use back-channel? */ + void (*side_cb)(int, int, int, http_addr_t *, int)) + /* I - Side-channel callback */ { int nfds; /* Maximum file descriptor value + 1 */ fd_set input, /* Input set for reading */ @@ -63,13 +227,18 @@ backendRunLoop( char print_buffer[8192], /* Print data buffer */ *print_ptr, /* Pointer into print data buffer */ bc_buffer[1024]; /* Back-channel data buffer */ + struct timeval timeout; /* Timeout for select() */ + time_t curtime, /* Current time */ + snmp_update = 0; #if defined(HAVE_SIGACTION) && !defined(HAVE_SIGSET) struct sigaction action; /* Actions for POSIX signals */ #endif /* HAVE_SIGACTION && !HAVE_SIGSET */ - fprintf(stderr, "DEBUG: backendRunLoop(print_fd=%d, device_fd=%d, use_bc=%d)\n", - print_fd, device_fd, use_bc); + fprintf(stderr, + "DEBUG: backendRunLoop(print_fd=%d, device_fd=%d, snmp_fd=%d, " + "addr=%p, use_bc=%d, side_cb=%p)\n", + print_fd, device_fd, snmp_fd, addr, use_bc, side_cb); /* * If we are printing data from a print driver on stdin, ignore SIGTERM @@ -103,7 +272,8 @@ backendRunLoop( * Now loop until we are out of data from print_fd... */ - for (print_bytes = 0, print_ptr = print_buffer, offline = 0, paperout = 0, total_bytes = 0;;) + for (print_bytes = 0, print_ptr = print_buffer, offline = -1, + paperout = -1, total_bytes = 0;;) { /* * Use select() to determine whether we have data to copy around... @@ -118,23 +288,32 @@ backendRunLoop( FD_SET(CUPS_SC_FD, &input); FD_ZERO(&output); - if (print_bytes || !use_bc) + if (print_bytes || (!use_bc && !side_cb)) FD_SET(device_fd, &output); if (use_bc || side_cb) { - if (select(nfds, &input, &output, NULL, NULL) < 0) + timeout.tv_sec = 5; + timeout.tv_usec = 0; + + if (select(nfds, &input, &output, NULL, &timeout) < 0) { /* * Pause printing to clear any pending errors... */ - if (errno == ENXIO && !offline) + if (errno == ENXIO && offline != 1) { fputs("STATE: +offline-error\n", stderr); - fputs("INFO: Printer is currently off-line.\n", stderr); + _cupsLangPuts(stderr, _("INFO: Printer is currently offline.\n")); offline = 1; } + else if (errno == EINTR && total_bytes == 0) + { + fputs("DEBUG: Received an interrupt before any bytes were " + "written, aborting!\n", stderr); + return (0); + } sleep(1); continue; @@ -146,7 +325,7 @@ backendRunLoop( */ if (side_cb && FD_ISSET(CUPS_SC_FD, &input)) - (*side_cb)(print_fd, device_fd, use_bc); + (*side_cb)(print_fd, device_fd, snmp_fd, addr, use_bc); /* * Check if we have back-channel data ready... @@ -214,25 +393,26 @@ backendRunLoop( if (errno == ENOSPC) { - if (!paperout) + if (paperout != 1) { - fputs("ERROR: Out of paper!\n", stderr); fputs("STATE: +media-empty-error\n", stderr); + _cupsLangPuts(stderr, _("ERROR: Out of paper!\n")); paperout = 1; } } else if (errno == ENXIO) { - if (!offline) + if (offline != 1) { fputs("STATE: +offline-error\n", stderr); - fputs("INFO: Printer is currently off-line.\n", stderr); + _cupsLangPuts(stderr, _("INFO: Printer is currently off-line.\n")); offline = 1; } } else if (errno != EAGAIN && errno != EINTR && errno != ENOTTY) { - perror("ERROR: Unable to write print data"); + fprintf(stderr, _("ERROR: Unable to write print data: %s\n"), + strerror(errno)); return (-1); } } @@ -247,7 +427,7 @@ backendRunLoop( if (offline) { fputs("STATE: -offline-error\n", stderr); - fputs("INFO: Printer is now on-line.\n", stderr); + _cupsLangPuts(stderr, _("INFO: Printer is now online.\n")); offline = 0; } @@ -258,6 +438,18 @@ backendRunLoop( total_bytes += bytes; } } + + /* + * Do SNMP updates periodically... + */ + + if (snmp_fd >= 0 && time(&curtime) >= snmp_update) + { + if (backendSNMPSupplies(snmp_fd, addr, NULL, NULL)) + snmp_update = INT_MAX; + else + snmp_update = curtime + 5; + } } /* @@ -269,5 +461,5 @@ backendRunLoop( /* - * End of "$Id: runloop.c 6170 2007-01-02 17:26:41Z mike $". + * End of "$Id: runloop.c 6834 2007-08-22 18:29:25Z mike $". */